<template>
  <div class='xtx-carousel'>
    <ul class="carousel-body">
      <li class="carousel-item" v-for="(item,key) in img" :key="item.id" :class="{fade:key==imglist}">
        <RouterLink to="/">
          <img :src="item.imgUrl" alt="">
        </RouterLink>
      </li>
    </ul>
    <a href="javascript:;" class="carousel-btn prev" @click="add"><i class="iconfont icon-angle-left"></i></a>
    <a href="javascript:;" class="carousel-btn next" @click="add1"><i class="iconfont icon-angle-right"></i></a>
    <div class="carousel-indicator">
      <span v-for="(item,key) in img" :key="item.id" @click="add2(key)" :class="{span:key==imglist}"></span>
    </div>
  </div>
</template>
  
  <script>
import { getbanner } from '@/utils/api/homeapi'
export default {
  data() {
    return {
      img: [],
      imglist: 0,
      time: null
    }
  },
  methods: {
    async getbanner() {
      let res = await getbanner()
      this.img = res.result
      //  console.log(this.img);
    },
    add() {
      if (this.imglist != 0) {
        this.imglist--
        clearInterval(this.time);
        this.times()
      } else {
        this.imglist = 4
      }
    },
    add1() {
      if (this.imglist != 4) {
        this.imglist++
        clearInterval(this.time);
        this.times()
      } else {
        this.imglist = 0
      }
    },
    add2(key) {
      this.imglist = key
    },
    times() {
      this.time = setInterval(() => {
        this.imglist++
        // console.log(123)
        if (this.imglist >= this.img.length) {
          this.imglist = 0
        }
      }, 5000)
    }
  },
  mounted() {
    this.getbanner()
    this.times()
  },
  beforeDestroy() {
    if (this.time) {
      clearInterval(this.time);
      this.time = null;
    }
  }
}
  </script>
  
  <style lang="scss" scoped>
.xtx-carousel {
  width: 100%;
  height: 100%;
  min-width: 1240px;
  min-height: 500px;
  position: relative;
  .carousel {
    &-body {
      width: 100%;
      height: 100%;
    }
    &-item {
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0;
      opacity: 0;
      transition: opacity 0.5s linear;
      &.fade {
        opacity: 1;
        z-index: 1;
      }
      img {
        width: 100%;
        height: 100%;
      }
    }
    &-indicator {
      position: absolute;
      left: 0;
      bottom: 20px;
      z-index: 2;
      width: 100%;
      text-align: center;
      span {
        display: inline-block;
        width: 12px;
        height: 12px;
        background: rgba(0, 0, 0, 0.2);
        border-radius: 50%;
        cursor: pointer;
        ~ span {
          margin-left: 12px;
        }
        &.active {
          background: #fff;
        }
      }
    }
    &-btn {
      width: 44px;
      height: 44px;
      background: rgba(0, 0, 0, 0.2);
      color: #fff;
      border-radius: 50%;
      position: absolute;
      top: 228px;
      z-index: 2;
      text-align: center;
      line-height: 44px;
      opacity: 0;
      transition: all 0.5s;
      &.prev {
        left: 20px;
        // background: red;
        margin-left: 240px;
      }
      &.next {
        right: 20px;
      }
    }
  }
  &:hover {
    .carousel-btn {
      opacity: 1;
    }
  }
  .carousel-indicator {
    .span {
      background: #fff;
    }
  }
}
</style>